Determination of the chiral condensate from QCD Dirac spectrum on the lattice

Details Determination of the chiral condensate from QCD Dirac spectrum on the lattice Determination of the chiral condensate from QCD Dirac spectrum on the lattice

2010-12-18

arxiv.org/abs/1012.4052v3

Phys.Rev.D83:074501,2011

Physics

High Energy Physics

High Energy Physics - Lattice

38 pages, 11 figures, minor corrections, version appearing in PRD

Scientific paper

10.1103/PhysRevD.83.074501

We calculate the chiral condensate of QCD with 2, 2+1 and 3 flavors of sea quarks. Lattice QCD simulations are performed employing dynamical overlap fermions with up and down quark masses covering a range between 3 and 100 MeV. On L ~ 1.8-1.9 fm lattices at a lattice spacing ~ 0.11 fm, we calculate the eigenvalue spectrum of the overlap-Dirac operator. By matching the lattice data with the analytical prediction from chiral perturbation theory at the next-to-leading order, the chiral condensate in the massless limit of up and down quarks is determined.

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